Stroller with damping function

Abstract

The child stroller with the damping function comprises a foldable bottom supporting frame, the upper end of the bottom supporting frame is rotatably connected with a push rod assembly, wheels are arranged at the lower end of the bottom supporting frame, a sliding seat capable of sliding up and down relative to the bottom supporting frame is arranged at the upper end of the bottom supporting frame, and a damping spring is arranged between the sliding seat and the bottom supporting frame. One end of the damping spring abuts against the sliding seat, the other end of the damping spring abuts against the bottom supporting frame, and the sliding seat is detachably connected with a foldable seat assembly. The structure is simple, and the damping function is achieved.

Description

Technical Field

[0001] This invention relates to a children's stroller with shock absorption function. Background Technology

[0002] Strollers are common products used by infants and toddlers during their growth. They generally include a bottom support frame, a push rod assembly, and a seat assembly. To reduce bumps when strollers travel over uneven surfaces, many strollers on the market are equipped with shock absorption mechanisms, but these mechanisms are often quite complex.

[0003] Therefore, the present invention was developed based on the above-mentioned shortcomings. Summary of the Invention

[0004] This invention provides a children's stroller with a simple structure and shock absorption function.

[0005] This invention is achieved through the following technical solution:

[0006] The stroller with shock absorption function has a foldable bottom support frame with a push rod assembly rotatably connected to the upper end. The lower end of the bottom support frame is equipped with wheels, and the upper end of the bottom support frame is equipped with a sliding seat that can slide up and down relative to it. A shock-absorbing spring is provided between the sliding seat and the bottom support frame. One end of the shock-absorbing spring abuts against the sliding seat, and the other end abuts against the bottom support frame. A foldable seat assembly is detachably connected to the sliding seat.

[0007] The bottom support frame includes rear legs, with a fixed seat at the upper end of the rear legs. A front leg is rotatably connected to the fixed seat. Wheels are located at the lower ends of the front and rear legs. A push rod assembly is rotatably connected to the fixed seat. The fixed seat also has a transverse crossbar. The sliding seat includes a sliding body slidably connected to the fixed seat. The sliding body has a transverse tube sleeved on the crossbar. A buffer gap is provided between the cross tube and the crossbar. A longitudinal sleeve is provided on the cross tube. An end cap is fixedly connected to the upper end of the sleeve. A shock-absorbing spring is located inside the sleeve, with its lower end abutting against the crossbar and its upper end abutting against the end cap. A seat assembly is connected to the sliding body. A sealing sleeve that closes the buffer gap is fixed on the crossbar. The sliding body has a longitudinal guide rib. The fixed seat has a groove that slides in cooperation with the guide rib.

[0008] The push rod assembly includes a lower push rod and an upper push rod that can extend and retract within the lower push rod. The lower end of the lower push rod is provided with a push rod seat, which is rotatably connected to a fixed seat. The upper end of the front leg is provided with an arc-shaped groove. A movable rod is slidably provided within the fixed seat. The lower end of the movable rod is provided with a horizontal post that inserts into the arc-shaped groove, and the upper end of the movable rod is provided with a horizontal protrusion. The push rod seat is provided with a drive groove for the protrusion to be inserted. When the push rod assembly rotates and folds relative to the rear leg, the groove wall of the drive groove pushes the protrusion, causing the movable rod to push the front leg to rotate and move closer to the rear leg. A locking mechanism is provided between the push rod seat and the front leg to lock the unfolded position of the front leg, and a locking mechanism is provided between the push rod seat and the fixed seat to lock the unfolded position of the push rod assembly.

[0009] The locking mechanism includes a locking groove on the upper end of the front leg, a sliding rod slidably disposed in the fixed seat, a locking pin at the lower end of the sliding rod that can engage or disengage with the locking groove, a convex shaft at the upper end of the sliding rod, and a control groove on the push rod seat for the convex shaft to be inserted. When the push rod assembly rotates and folds relative to the rear leg, the groove wall of the control groove pushes the convex shaft, causing the sliding rod to disengage the locking pin from the locking groove. After the locking pin disengages from the locking groove, the push rod seat can push the movable rod to push the front leg.

[0010] The fixed seat includes an outer seat body and an inner seat body. The lower end of the push rod assembly and the upper end of the front leg are located between the outer seat body and the inner seat body. A crossbar is connected to the inner seat body, and a sliding body is slidably connected to the inner seat body. The seat assembly includes a locking seat that can be locked onto the sliding body. A locking structure is provided between the locking seat and the sliding body. A seat part that can rotate relative to the locking seat is connected to the locking seat. A locking structure is provided between the seat part and the locking seat. A backrest is rotatably connected to the rear side of the seat part. A locking assembly is provided between the backrest and the seat part. An armrest is also rotatably connected to the rear side of the seat part. A locking device is provided between the armrest and the seat part. A first unlocking member that can drive the locking assembly to unlock is provided on the upper side of the backrest. A first unlocking part that can drive the locking device to unlock is provided on the lower side of the backrest when it rotates and folds relative to the seat part. A second unlocking part that can drive the locking structure to unlock is provided on the armrest when the locking device is unlocked and it rotates and folds relative to the seat part. A second unlocking member that can drive the locking structure to unlock is provided on the seat part.

[0011] The seat includes a seat body, which is rotatably connected to a locking seat around a third axis. The backrest and armrest are rotatably connected to the seat body around a fourth axis, which is located above and parallel to the third axis. A connecting shaft is fixedly connected to the seat body. A protrusion is provided at the end of the connecting shaft away from the seat body. The backrest and armrest are sleeved on the connecting shaft and rotate around it. The locking device includes a locking groove on the protrusion. A locking protrusion that can engage or disengage from the locking groove is slidably provided in the armrest. A transverse axis is provided on the locking protrusion. The first unlocking part is an unlocking groove located on the lower side of the backrest. The transverse axis is inserted into the unlocking groove, and when the backrest rotates towards the seat, the groove wall of the unlocking groove pushes the transverse axis, causing the locking protrusion to disengage from the locking groove. A third return spring that can push the locking protrusion back to its original position is also provided in the armrest.

[0012] The locking structure includes a locking hole on the latch seat, a horizontal pin that can engage or disengage from the locking hole and slide inside the seat, an exposed longitudinal block that can move longitudinally on the seat, an inclined hole on the longitudinal block, and a pin that passes through the inclined hole on the horizontal pin. When the longitudinal block moves downward, the wall of the inclined hole pushes the pin, causing the horizontal pin to disengage laterally from the locking hole. A fourth return spring that can push the longitudinal block upward is provided between the seat and the longitudinal block. The second unlocking part is an unlocking groove on the lower outer circumference of the armrest and can engage with the upper end of the longitudinal block. When the armrest is in the unfolded state, the upper end of the longitudinal block is located in the unlocking groove, causing the horizontal pin to engage with the locking hole. When the armrest rotates relative to the seat, the unlocking groove disengages from the upper end of the longitudinal block and the outer circumference of the armrest pushes the longitudinal block downward, causing the horizontal pin to disengage from the locking hole.

[0013] The locking structure includes a longitudinal slot on the locking seat that engages with the locking strip on the sliding body. The locking structure also includes a transverse locking block that is laterally slidably disposed on the locking seat and engages with the transverse slot on the sliding body. The second unlocking component includes a sliding rod slidably disposed in the locking seat. The sliding rod and the transverse locking block are engaged by an inclined surface so that when the sliding rod slides downward, it can push the transverse locking block to disengage from the transverse slot. The locking seat is also provided with a fifth return spring that can push the transverse locking block to reset. The seat part is provided with an exposed button that can push the sliding rod to slide downward. A sixth return spring is also provided between the locking seat and the sliding rod that can push the sliding rod to reset upward.

[0014] The sliding rod is equipped with a movable frame that can move laterally. The movable frame includes a main body, an upper protrusion at the upper end of the main body, and a lower protrusion at the lower end of the main body. The locking seat is provided with an upper locking hole for the upper protrusion to be engaged, and the locking seat is also provided with a longitudinal groove for the lower protrusion to move longitudinally inward. An elastic element that can push the movable frame to move is also provided between the sliding rod and the movable frame. When the sliding rod slides downward, the elastic element pushes the movable frame to move outward, so that the upper protrusion engages with the upper locking hole. The lower protrusion is provided with an inclined surface. When the locking seat is engaged with the sliding body from top to bottom, the inclined surface abuts against the sliding body, so that the movable frame moves inward, thereby causing the upper protrusion to disengage from the upper locking hole.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The seat assembly of the present invention is installed on a sliding seat, which can slide up and down relative to the bottom support frame. One end of the shock-absorbing spring abuts against the sliding seat and the other end abuts against the bottom support frame. Therefore, when the stroller passes over uneven roads, the shock-absorbing spring will play a shock-absorbing role, making the child comfortable to ride.

[0017] 2. The sliding seat of the present invention includes a sliding body that slides up and down along a fixed seat. A transverse sleeve is provided on the sliding body, which is fitted onto a crossbar and has a buffer gap. A shock-absorbing spring is installed inside a sleeve communicating with the sleeve. The upper end of the shock-absorbing spring abuts against the end cap at the upper end of the sleeve, and the lower end abuts against the crossbar. Therefore, the sliding seat is connected to the fixed seat in the longitudinal direction and to the crossbar in the transverse direction, ensuring a secure connection. The shock-absorbing spring is located inside the sleeve, making its position stable and preventing displacement. This ensures that the stroller can absorb vibrations and be cushioned when traveling over bumpy roads, making the child comfortable to ride.

[0018] 3. The seat part of the present invention is rotatably connected to the card seat around the third axis, and the backrest and armrest part are rotatably connected to the seat part around the fourth axis. The fourth axis is located above the third axis and is parallel to the third axis. This design allows the sides of the seat part to be made thinner, thereby ensuring that the seat part has a sufficiently wide seating space without increasing the overall width of the seat assembly, so that children can sit comfortably.

[0019] 4. In this invention, during folding, the seat assembly is folded first. As the backrest and armrests rotate relative to the seat assembly and move closer together, the armrests unlock the locking mechanism, allowing the seat assembly to rotate relative to the locking seat and move closer to the bottom support frame. Finally, the push rod assembly rotates towards the rear legs. As the push rod assembly moves towards the rear legs, it pushes the front legs towards the rear legs via a movable rod, thus achieving the overall folding of the stroller. Therefore, during folding, simply operating the first unlocking mechanism and rotating the backrest forward will trigger a linkage that moves both the armrests and seat assembly to their folding positions. Then, operating the locking mechanism between the push rod assembly and the fixed seat to unlock and rotating the folding push rod assembly will trigger a linkage that rotates the front legs to fold. The entire folding operation is very convenient and quick. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 This is a side view of the present invention;

[0022] Figure 3 This is an exploded view of the present invention;

[0023] Figure 4 yes Figure 3 Enlarged view at point E in the middle;

[0024] Figure 5 This is one of the exploded views of the components of the present invention;

[0025] Figure 6 yes Figure 5 Enlarged view at point F;

[0026] Figure 7This is a second exploded view of the components of the present invention;

[0027] Figure 8 This is one of the perspective views of the seat assembly of the present invention;

[0028] Figure 9 This is a second perspective view of the seat assembly of the present invention;

[0029] Figure 10 This is the third exploded view of the components of the present invention;

[0030] Figure 11 yes Figure 10 Enlarged view at point G;

[0031] Figure 12 This is the fourth exploded view of the components of the present invention;

[0032] Figure 13 This is one of the perspective views of the components of the present invention;

[0033] Figure 14 This is the fifth exploded view of the components of the present invention;

[0034] Figure 15 This is the sixth exploded view of the components of the present invention;

[0035] Figure 16 This is the seventh exploded view of the components of the present invention;

[0036] Figure 17 This is a second perspective view of a component of the present invention;

[0037] Figure 18 This is the third perspective view of the component of the present invention;

[0038] Figure 19 This is the eighth exploded view of the components of the present invention;

[0039] Figure 20 This is the ninth exploded view of the components of the present invention;

[0040] Figure 21 This is the tenth exploded view of the components of the present invention;

[0041] Figure 22 This is an exploded view of the components of the present invention, number eleven.

[0042] Figure 23 This is a side view of a component of the present invention;

[0043] Figure 24 This is a side view of the folded state of the present invention. Detailed Implementation

[0044] The present invention will now be further described with reference to the accompanying drawings:

[0045] As attached Figures 1 to 7 and Figure 24 As shown, the shock-absorbing stroller includes a foldable bottom support frame 1, with wheels 3 at its lower end and a push rod assembly 2 rotatably connected to its upper end. A sliding seat 4, which can slide up and down relative to the bottom support frame 1, is detachably connected to the sliding seat 4. A shock-absorbing spring 5 is installed between the sliding seat 4 and the bottom support frame 1. One end of the shock-absorbing spring 5 abuts against the sliding seat 4, and the other end abuts against the bottom support frame 1, thereby effectively absorbing impacts and vibrations from the road surface through its elastic deformation, significantly improving the stability and riding comfort of the stroller. The entire shock-absorbing mechanism has a very simple structure and good shock absorption effect.

[0046] like Figures 1 to 7 As shown, the bottom support frame 1 includes a rear leg 11, with a fixed seat 12 at the upper end of the rear leg 11. A front leg 13 is rotatably connected to the fixed seat 12 about a first axis A, and wheels 3 are respectively located at the lower ends of the front leg 13 and the rear leg 11. The push rod assembly 2 is rotatably connected to the fixed seat 12 about a second axis B. A transverse crossbar 14 is also provided on the fixed seat 12. The sliding seat 4 includes a sliding body 41 slidably connected to the fixed seat 12, and a seat assembly 6 is connected to the sliding body 41. A transverse tube 42 is provided on the sliding body 41 and sleeved on the crossbar 14. A buffer gap 43 is reserved between the transverse tube 42 and the crossbar 14, which allows the sliding body 41 to provide movement space for shock absorption when sliding up and down. A longitudinal sleeve 44 is fixed on the transverse tube 42, and an end cap 45 is connected to the upper end of the sleeve 44. A shock-absorbing spring 5 is disposed inside the sleeve 44, with its lower end abutting against the crossbar 14 and its upper end abutting against the end cap 45. When wheel 3 encounters a bump, the impact force is transmitted to sliding seat 4 through bottom support frame 1. Sliding seat 4 then moves downwards, compressing shock-absorbing spring 5 through end cover 45. The shock-absorbing spring's cushioning effect effectively filters shocks, ensuring a stable ride for children. A sealing sleeve 15 is fixed to the crossbar 14 to enclose the buffer gap 43, preventing dust and foreign objects from entering the gap. Figure 20 and Figure 22 As shown, the sliding body 41 is provided with a longitudinal guide rib 46, and the fixed seat 12 is provided with a sliding groove 17 that slides in cooperation with the guide rib 46, so that the sliding seat 4 slides smoothly up and down with the seat assembly 6.

[0047] like Figure 1 , Figure 2 as well as Figures 19 to 23As shown, the push rod assembly 2 includes a lower push rod 21 and an upper push rod 22 that can extend and retract within it. The lower end of the lower push rod 21 has a push rod seat 23, which is rotatably connected to the fixed base 12 around the second axis B. To achieve coordinated folding of the stroller, the upper end of the front leg 13 has an arc-shaped groove 16. A movable rod 71 is slidably mounted within the fixed base 12. The lower end of the movable rod 71 has a horizontal post 72 that can be inserted into the arc-shaped groove 16, and the upper end has a horizontal protrusion 73. The push rod seat 23 has a drive groove 24 for the protrusion 73 to be inserted. When the push rod assembly 2 folds backward relative to the rear leg 11, the groove wall of the drive groove 24 pushes the protrusion 73, causing the movable rod 71 to move downward. This causes the horizontal post 72 at its lower end to move within the arc-shaped groove 16 and push the front leg 13 to rotate around the first axis A towards the rear leg 11, achieving coordinated folding of the push rod assembly 2 and the front leg 13. This operation is simple and effortless. A locking mechanism 81 is provided between the push rod base 23 and the front leg 13 to lock the front leg 13 when it is extended, preventing accidental folding. A locking mechanism 82 is provided between the push rod base 23 and the fixed base 12 to lock the extended position of the push rod assembly 2.

[0048] like Figures 19 to 23 As shown, the locking mechanism 81 includes a locking groove 811 located on the upper end of the front leg 13. A sliding rod 812 is slidably disposed within the fixed base 12. The lower end of the sliding rod 812 has a locking pin 813 that can engage or disengage from the locking groove 811, and the upper end has a protruding shaft 814. The push rod seat 23 has a control groove 815 for the protruding shaft 814 to be inserted. In the initial stage of the push rod assembly 2 starting to rotate and fold, the groove wall of the control groove 815 first pushes the protruding shaft 814, causing the sliding rod 812 to disengage the locking pin 813 from the locking groove 811, thus releasing the lock on the front leg 13. This design ensures the correct operating sequence: only after the locking pin 813 disengages from the locking groove 811 can the push rod seat 23 continue to rotate and push the movable rod 71 through the drive groove 24 to push the front leg 13, avoiding interference and making the folding process smooth and safe.

[0049] like Figures 8 to 18As shown, the fixed seat 12 adopts a split design, including an outer seat body 121 and an inner seat body 122, with the lower end of the push rod assembly 2 and the upper end of the front leg 13 positioned between them. A crossbar 14 is connected to the inner seat body 122, and a sliding body 41 is slidably connected to the inner seat body 122, resulting in a compact and stable structure. The seat assembly 6 includes a locking seat 61 that can be engaged with the sliding body 41, with a locking structure 62 between them for reliable connection and quick disassembly. A seat portion 63, which can rotate relative to the locking seat 61, is connected to the locking seat 61, and a locking structure 64 is provided between the seat portion 63 and the locking seat 61 to fix its unfolded position. A backrest 65 is rotatably connected to the rear side of the seat portion 63, and a locking assembly 66 is provided between them to fix the backrest position. An armrest 67 is also rotatably connected to the rear side of the seat portion 63, and a locking device 68 is provided between the armrest 67 and the seat portion 63. To achieve orderly, coordinated folding, the upper side of the backrest 65 is provided with a first unlocking member 91 that can drive the locking assembly 66 to unlock, and the lower side of the backrest 65 is provided with a first unlocking part 92 that can drive the locking device 68 to unlock when it rotates and folds relative to the seat part 63. The armrest 67 is provided with a second unlocking part 93 that can drive the locking structure 64 to unlock when the locking device 68 is unlocked and it rotates and folds relative to the seat part 63. The seat part 63 is also provided with a second unlocking member 94 that can drive the locking structure 62 to unlock. This multi-linkage design allows the subsequent unlocking and folding of the armrest 67 and seat part 63 to be automatically triggered when the backrest 65 is folded, thus ensuring that the folding operation of the stroller is convenient and quick. When it is necessary to remove the seat assembly 6 from the slider 41, the locking structure 62 can be unlocked simply by using the second unlocking member 94.

[0050] like Figures 8 to 18As shown, the seat portion 63 includes a seat body 631, which is rotatably connected to a locking seat 61 about a third axis C. The backrest 65 and armrest portion 67 are rotatably connected to the seat body 631 about a fourth axis D, wherein the fourth axis D is located above and parallel to the third axis C. A connecting shaft 632 is fixed to the seat body 631. A protrusion 633 is provided at the end of the connecting shaft 632 away from the seat body 631. The backrest 65 and armrest portion 67 are fitted onto the connecting shaft 632 and can rotate around it. The locking device 68 includes a locking groove 681 provided on the protrusion 633. A locking protrusion 682, which can engage or disengage from the locking groove 681, is slidably provided in the armrest portion 67. A transverse shaft 683 is provided on the locking protrusion 682. The first unlocking part 92 is an unlocking groove provided on the lower side of the backrest 65, into which the transverse shaft 683 is inserted. When the backrest 65 rotates and folds towards the seat 63, the wall of the unlocking groove pushes against the horizontal axis 683, forcing the locking protrusion 682 to move inward, thereby disengaging it from the locking groove 681 and automatically releasing the locked state of the armrest 67. A third return spring 684 is provided inside the armrest 67 to push the locking protrusion 682 back to its original position and re-engage with the locking groove 681 when the backrest 65 is unfolded, ensuring the stability of the armrest after unfolding.

[0051] like Figures 14 to 18As shown, the locking structure 64 includes a locking hole 641 on the latching seat 61. A transverse pin 642, which can engage or disengage from the locking hole 641, is slidably disposed within the seat portion 63. The seat portion 63 also has an exposed longitudinal block 643 that can move longitudinally. The longitudinal block 643 has an inclined hole 644, and the transverse pin 642 has a pin 645 that passes through the inclined hole 644. When the longitudinal block 643 is subjected to an external force and moves downward, the wall of the inclined hole 644 pushes against the pin 645, forcing the transverse pin 642 to move laterally and exit the locking hole 641, thereby releasing the lock between the seat portion 63 and the latching seat 61. A fourth return spring 646 is provided between the seat portion 63 and the longitudinal block 643 to push the longitudinal block 643 upward and reset it when there is no external force, so that the transverse pin 642 re-engages into the locking hole 641. The second unlocking part 93 is an unlocking groove 931 provided on the outer peripheral surface of the lower end of the armrest portion 67. When the armrest 67 is in the unfolded state, the upper end of the longitudinal block 643 is located in the unlocking groove 931, and the horizontal pin 642 is engaged with the locking hole 641, locking the seat 63. When the armrest 67 rotates and folds relative to the seat 63, the unlocking groove 931 rotates accordingly and disengages from the upper end of the longitudinal block 643. At the same time, the outer circumference of the armrest 67 begins to push the longitudinal block 643 downward, causing it to move down and, through the action of the inclined hole 644, drive the horizontal pin 642 out of the locking hole 641, thus realizing the automatic linkage unlocking of the seat 63 by the folding action of the armrest 67. After the locking structure 64 is unlocked, the backrest 65, armrest 67, and seat 63, which are close together, will rotate downward relative to the locking seat 61 as a whole and move closer to the back legs 11, thus completing the folding of the seat assembly 6. Next, by operating the locking mechanism 82 to unlock, the folding push rod assembly 2 can be rotated backward. During the folding process, the push rod assembly 2 pushes the front leg 13 towards the rear leg 11 via the movable rod 71, thus achieving complete folding of the entire stroller. Therefore, when folding the stroller, only the seat assembly 6 needs to be folded first, followed by the push rod assembly 2 and the front leg 13. The entire folding process is controlled in a linked manner, making the folding operation very convenient and quick. In this embodiment, the locking mechanism 82 includes a locking groove 821 on the fixed base 12. A sliding rod 822 is slidably provided inside the push rod base 23, and the sliding rod 822 is provided with a locking pin 823 that can engage or disengage with the locking groove 821. A slidable sleeve 824 is fitted on the upper part of the lower push rod 21, and a second pull rope 825 connects the sleeve 824 and the sliding rod 822. When it is necessary to fold the push rod assembly 2, slide the sliding sleeve 824 upwards, and pull the sliding rod 822 through the second pull rope 825, causing the locking pin 823 to disengage from the locking groove 821, thereby releasing the lock on the push rod assembly 2. The push rod seat 23 is equipped with a seventh return spring 826, which is used to push the sliding rod 822 and the locking pin 823 to return to their original positions after the sliding sleeve 824 is released, ensuring that the push rod assembly 2 can automatically lock when unfolded.

[0052] like Figure 4 , Figure 6 as well as Figures 10 to 15 As shown, the locking structure 62 is used to reliably connect the locking seat 61 to the sliding body 41. It includes a longitudinal slot 621 on the locking seat 61 that engages with the locking strip 411 on the sliding body 41, and a transverse locking block 622 that is laterally slidably disposed on the locking seat 61 and engages with the transverse slot 412 on the sliding body 41. The second unlocking member 94 includes a sliding rod 941 slidably disposed within the locking seat 61. The sliding rod 941 and the transverse locking block 622 are engaged by an inclined surface, so that when the sliding rod 941 slides downward, it can push the transverse locking block 622 to disengage from the transverse slot 412. A fifth return spring 623 is provided within the locking seat 61 to push the transverse locking block 622 back into engagement. An exposed button 942 is provided on the seat portion 63; pressing the button 942 pushes the sliding rod 941 downward. A sixth return spring 624 is provided between the locking seat 61 and the sliding rod 941 to reset the sliding rod 941 when necessary. To facilitate user disassembly of the seat assembly 6, a laterally movable frame 95 is provided within the sliding rod 941. The movable frame 95 includes a body 951, with an upper protrusion 952 at its upper end and a lower protrusion 953 at its lower end. The locking seat 61 has an upper locking hole 611 into which the upper protrusion 952 can be engaged, and a longitudinal groove 612 into which the lower protrusion 953 can move longitudinally. An elastic element 96 is provided between the sliding rod 941 and the movable frame 95. When the locking structure 62 is in the locked state, the outer end of the upper protrusion 952 abuts against the inner wall of the locking seat 61, and the elastic element 96 is in a compressed state. When button 942 is pressed and sliding rod 941 slides downward, moving frame 95 moves downward. When upper protrusion 952 moves to align with upper locking hole 611 on locking seat 61, elastic element 96 pushes moving frame 95 outward, causing upper protrusion 952 to engage with upper locking hole 611. At this time, sliding rod 941 is locked and transverse locking block 622 disengages from transverse locking groove 412. The unlocked state of locking structure 62 is maintained, and the user can release button 942 to free up their hand to lift seat assembly 6 upward, thus ensuring that seat assembly 6 can be easily removed. When the seat assembly 6 needs to be installed, the snap-fit ​​seat 61 is snapped onto the slide body 41 from top to bottom. During this process, the inclined surface 954 on the lower protrusion 953 at the lower end of the moving frame 95 will abut against the top of the slide body 41, forcing the moving frame 95 to move inward, thereby causing the upper protrusion 952 to exit from the upper snap-fit ​​hole 611 and releasing the lock on the sliding rod 941. At this time, the sixth return spring 624 pushes the sliding rod 941 to slide upward and reset, and the fifth return spring 623 pushes the transverse snap-fit ​​block 622 to engage with the transverse snap-fit ​​groove 412 again.

[0053] like Figure 9 , Figure 14 and Figure 15As shown, the locking assembly 66 is used to fix the unfolded position of the backrest 65, and includes a locking groove 661 located on the rear side of the seat portion 63. A locking block 662 is slidably provided on the lower side of the backrest 65, which can engage or disengage with the locking groove 661. The first unlocking member 91 includes an unlocking block 911 rotatably connected to the backrest 65, and a first pull rope 912 is provided between the unlocking block 911 and the locking block 662. When the unlocking block 911 is rotated, the first pull rope 912 can pull the locking block 662, causing it to disengage from the locking groove 661, thereby unlocking the backrest 65. An eighth return spring 663 is provided between the backrest 65 and the locking block 662, which can push the locking block 662 to return to its original position and engage with the corresponding locking groove 661 when the backrest 65 is unfolded.

Claims

1. A child's stroller having shock absorbing features, characterized in that: The utility model provides a foldable seat, which comprises a foldable bottom support frame (1), a push rod assembly (2) rotatably connected to the upper end of the bottom support frame (1), a wheel (3) arranged at the lower end of the bottom support frame (1), a sliding seat (4) capable of sliding up and down relative to the upper end of the bottom support frame (1), a damping spring (5) arranged between the sliding seat (4) and the bottom support frame (1), one end of the damping spring (5) abutting against the sliding seat (4) and the other end abutting against the bottom support frame (1), and a foldable seat assembly (6) detachably connected to the sliding seat (4).

2. The stroller with shock-absorbing function according to claim 1, characterized in that: The bottom support frame (1) comprises a rear leg (11), a fixed seat (12) arranged at the upper end of the rear leg (11), a front leg (13) rotatably connected to the fixed seat (12) about a first axis (A), the wheel (3) arranged at the lower end of the front leg (13) and the rear leg (11), the push rod assembly (2) rotatably connected to the fixed seat (12) about a second axis (B), a transverse crossbar (14) arranged on the fixed seat (12), the sliding seat (4) comprising a sliding body (41) slidably connected to the fixed seat (12), a transverse cross pipe (42) arranged on the sliding body (41) and sleeved on the crossbar (14), a buffer gap (43) arranged between the cross pipe (42) and the crossbar (14), a longitudinal sleeve (44) arranged on the cross pipe (42), an end cover (45) fixedly connected to the upper end of the sleeve (44), the damping spring (5) arranged in the sleeve (44) and abutting against the crossbar (14) at the lower end and against the end cover (45) at the upper end, and the seat assembly (6) connected to the sliding body (41).

3. The stroller with shock-absorbing function according to claim 2, characterized in that: The crossbar (14) is fixed with a closing sleeve (15) closing the buffer gap (43), the sliding body (41) is provided with a longitudinal guide rib (46), and the fixed seat (12) is provided with a sliding groove (17) slidably matched with the guide rib (46).

4. The stroller with shock-absorbing function according to claim 2, characterized in that: The push rod assembly (2) comprises a lower push rod (21) and an upper push rod (22) capable of telescoping in the lower push rod (21), the lower push rod (21) is provided with a push rod base (23) at the lower end, the push rod base (23) is rotationally connected with the fixed base (12) around the second axis (B), the front leg (13) is provided with an arc-shaped slot (16) at the upper end, the fixed base (12) is provided with a movable rod (71) slidingly arranged therein, the movable rod (71) is provided with a transverse column (72) inserted into the arc-shaped slot (16) at the lower end, the movable rod (71) is provided with a transverse protruding column (73) at the upper end, the push rod base (23) is provided with a driving slot (24) for the protruding column (73) to be inserted, when the push rod assembly (2) is folded relative to the rear leg (11), the slot wall of the driving slot (24) pushes the protruding column (73) so that the movable rod (71) pushes the front leg (13) to rotate and close to the rear leg (11), the push rod base (23) and the front leg (13) are further provided with a locking mechanism (81) capable of locking the unfolded position of the front leg (13), the push rod base (23) and the fixed base (12) are provided with a locking mechanism (82) capable of locking the unfolded position of the push rod assembly (2).

5. The stroller with shock-absorbing function according to claim 4, characterized in that: The locking mechanism (81) comprises a locking slot (811) arranged at the upper end of the front leg (13), the fixed base (12) is provided with a sliding rod (812) slidingly arranged therein, the sliding rod (812) is provided with a locking column (813) capable of being locked or separated from the locking slot (811) at the lower end, the sliding rod (812) is provided with a protruding shaft (814) at the upper end, the push rod base (23) is provided with a control slot (815) for the protruding shaft (814) to be inserted, when the push rod assembly (2) is folded relative to the rear leg (11), the slot wall of the control slot (815) pushes the protruding shaft (814) so that the sliding rod (812) drives the locking column (813) to be separated from the locking slot (811), and after the locking column (813) is separated from the locking slot (811), the push rod base (23) can push the movable rod (71) to push the front leg (13).

6. The stroller with shock-absorbing function according to claim 2, characterized in that: The fixed seat (12) comprises an outer seat body (121) and an inner seat body (122), the lower end of the push rod assembly (2) and the upper end of the front leg (13) are arranged between the outer seat body (121) and the inner seat body (122), the cross rod (14) is connected to the inner seat body (122), the sliding body (41) is slidingly connected to the inner seat body (122), the seat assembly (6) comprises a clamping seat (61) capable of being clamped to the sliding body (41), the clamping seat (61) and the sliding body (41) are provided with a locking structure (62), the clamping seat (61) is connected with a seat part (63) capable of rotating relative to the clamping seat (61), the seat part (63) and the clamping seat (61) are provided with a locking structure (64), the rear side of the seat part (63) is rotatably connected with a backrest part (65), the backrest part (65) and the seat part (63) are provided with a locking assembly (66), the rear side of the seat part (63) is also rotatably connected with an armrest part (67), the armrest part (67) and the seat part (63) are provided with a locking device (68), the upper side of the backrest part (65) is provided with a first unlocking part (91) capable of driving the locking assembly (66) to be unlocked, the lower side of the backrest part (65) is provided with a first unlocking part (92) capable of driving the locking device (68) to be unlocked when the backrest part (65) is folded relative to the seat part (63), the armrest part (67) is provided with a second unlocking part (93) capable of driving the locking structure (64) to be unlocked when the locking device (68) is unlocked and the armrest part (67) is folded relative to the seat part (63), and the seat part (63) is further provided with a second unlocking part (94) capable of driving the locking structure (62) to be unlocked.

7. The stroller with shock-absorbing function according to claim 6, characterized in that: The seat part (63) comprises a seat body (631) rotatably connected with the clamping seat (61) around a third axis (C), the backrest part (65) and the armrest part (67) are rotatably connected with the seat body (631) around a fourth axis (D), the fourth axis (D) is above and parallel to the third axis (C), the seat body (631) is fixedly connected with a connecting shaft (632), one end of the connecting shaft (632) away from the seat body (631) is provided with a convex base (633), the backrest part (65) and the armrest part (67) are sleeved on the connecting shaft (632) and rotate around the connecting shaft (632), the locking device (68) comprises a locking groove (681) provided on the convex base (633), the armrest part (67) is slidably provided with a locking protrusion (682) capable of being engaged with or disengaged from the locking groove (681), the locking protrusion (682) is provided with a transverse horizontal shaft (683), the first unlocking part (92) is an unlocking groove provided on the lower side of the backrest part (65), the horizontal shaft (683) is inserted into the unlocking groove, and when the backrest part (65) is rotated to approach the seat part (63), the groove wall of the unlocking groove pushes the horizontal shaft (683) to make the locking protrusion (682) disengage from the locking groove (681), the armrest part (67) is further provided with a third reset spring (684) capable of pushing the locking protrusion (682) to reset.

8. The stroller with shock-absorbing function according to claim 6, characterized in that: The locking structure (64) comprises a locking hole (641) provided on the clamping seat (61), the seat part (63) is slidably provided with a horizontal pin (642) capable of being engaged with or disengaged from the locking hole (641), the seat part (63) is further provided with an exposed longitudinal block (643) capable of moving longitudinally, the longitudinal block (643) is provided with an inclined hole (644), the horizontal pin (642) is provided with a pin shaft (645) penetrating into the inclined hole (644), when the longitudinal block (643) moves downward, the inclined hole (644) pushes the pin shaft (645) to make the horizontal pin (642) transversely exit the locking hole (641), the fourth reset spring (646) capable of pushing the longitudinal block (643) to reset upward is arranged between the seat part (63) and the longitudinal block (643), the second unlocking part (93) is an unlocking groove (931) provided on the outer circumferential surface of the lower end of the armrest part (67) and capable of cooperating with the upper end of the longitudinal block (643), when the armrest part (67) is in the unfolded state, the upper end of the longitudinal block (643) is located in the unlocking groove (931) to make the horizontal pin (642) engage with the locking hole (641), when the armrest part (67) rotates relative to the seat part (63), the unlocking groove (931) is disengaged from the upper end of the longitudinal block (643) and the outer circumferential surface of the armrest part (67) pushes the longitudinal block (643) downward to make the horizontal pin (642) disengage from the locking hole (641).

9. The stroller with shock-absorbing function according to claim 6, characterized in that: The locking structure (62) comprises a longitudinal clamping groove (621) arranged on the clamping seat (61) and capable of clamping with the clamping strip (411) on the sliding body (41), and further comprises a transverse clamping block (622) arranged transversely and slidingly on the clamping seat (61) and capable of clamping with the transverse clamping groove (412) on the sliding body (41), the second unlocking member (94) comprises a sliding rod (941) slidingly arranged in the clamping seat (61), the sliding rod (941) is matched with the transverse clamping block (622) through a slope, so that when the sliding rod (941) slides downward, the transverse clamping block (622) can be pushed to disengage from the transverse clamping groove (412), the clamping seat (61) is further provided with a fifth reset spring (623) capable of pushing the transverse clamping block (622) to reset, the seat part (63) is provided with a button (942) exposed and capable of pushing the sliding rod (941) to slide downward, and the clamping seat (61) and the sliding rod (941) are further provided with a sixth reset spring (624) capable of pushing the sliding rod (941) to reset upward.

10. The stroller with shock-absorbing function according to claim 9, characterized in that: The sliding rod (941) is provided with a movable frame (95) capable of moving transversely, the movable frame (95) comprises a body (951), the body (951) is provided with an upper protrusion (952) at the upper end, the body (951) is provided with a lower protrusion (953) at the lower end, the clamping seat (61) is provided with an upper clamping hole (611) capable of clamping the upper protrusion (952), the clamping seat (61) is further provided with a longitudinal slot (612) capable of moving longitudinally inside the lower protrusion (953), the sliding rod (941) and the movable frame (95) are further provided with an elastic element (96) capable of pushing the movable frame (95) to move, when the sliding rod (941) slides downward, the elastic element (96) pushes the movable frame (95) to move outward so that the upper protrusion (952) clamps with the upper clamping hole (611), the lower protrusion (953) is provided with an inclined surface (954), when the clamping seat (61) is clamped from top to bottom on the sliding body (41), the inclined surface (954) abuts against the sliding body (41) so that the movable frame (95) moves inward, and then the upper protrusion (952) disengages from the upper clamping hole (611).

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